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   <h1>class <tt>CheckBox(<a href="Control.html">Control</a>)</tt></h1>
   <p>A CheckBox is a control which has either two or three possible states. The possible states of a two-state check box are <i>on </i>and <i>off</i>; three-state check boxes may have an additional state <span style="font-style: italic;">mixed</span>.
 Clicking the CheckBox changes it from one state to another. Each time
the state changes, its action is performed.</p><span style="font-style: italic;"></span><h2>Constructor</h2><dl style="margin-left: 40px;"><dt style="font-family: monospace;">CheckBox(title)</dt><dd>Constructs a CheckBox with the given title.</dd></dl>
   <h2>Properties</h2>
   <blockquote>     <dl>
    <dt><tt>title</tt></dt>
    <dd>Title string to be displayed beside the check box.</dd>
    <dd><br>
     </dd>
    <dt><span style="font-family: monospace;">value</span></dt>
    <dd>The state of the check box. May have the values <span style="font-family: monospace;">True</span> or <span style="font-family: monospace;">False</span>, and in the case of a three-state check box, <span style="font-family: monospace;">'mixed'</span>.</dd>
    <dd><br>
     </dd>
    <dt><tt>action</tt></dt>
    <dd>Action to perform when the user changes the state of the check box.
See <a href="actions.html">Actions</a>. 
    </dd>
    <dd><br>
     </dd>
    <dt><tt>auto_toggle</tt></dt>
    <dd>True if the <tt>on</tt> property is to be automatically changed when
the user clicks the check box. Defaults to true. If set to false, the action
will still be performed when the check box is clicked, but the program
is responsible for changing the state.<br><br></dd><dt style="font-family: monospace;">mixed</dt><dd>If true, the check box can be in a mixed state. Defaults to false.</dd>
  </dl>
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